<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title>line-height问题</title>
	<link rel="stylesheet" href="">
<style type="text/css">
        .same{
            font-size: 100px;
            border: 1px solid red;
        }
		.box2{
			line-height: 100%;
		}
    </style>
</head>
<body>
<div class="box1 same">我是超大字体,没有设置line-height</div>
<div class="box2 same">我是超大字体,设置line-height</div>
</body>
</html>